NASA – Walter Schirra, 1923-2007
Wally Schirra died today at the age of 84. Among many impressive accomplishments, I am struck by his singular feat of flying missions as part of the Mercury, Gemini, and Apollo programs. Starting with the fifth Mercury flight in 1962 (six orbits aboard the Sigma 7 and the first flawless Mercury flight), he flew again on Gemini 6A in 1965, and then commanded Apollo 7 in 1968. (Can one imagine NASA successfully managing three different programs using four different boosters, including overcoming the disaster of Apollo 1, in a span of six years ? Not these days.)
To remind yourself of the ‘Mercury seven’ astronauts, and of their considerable daring, a great starting point is here in Wikipedia.